An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1a) A remark, observation, or criticism (Dictionary.com).
1b) A note in explanation, expansion, or criticism of a passage in a book, article, or the like; annotation (Dictionary.com).
2) To make remarks, observations, or criticisms (Dictionary.com).

M.E. coment, from O.Fr. coment "commentary;" L.L. commentum "comment, interpretation," in classical L. "invention, fiction," from comminisci "to contrive, devise," from → com-, intensive prefix + base of meminisse "to remember," related to mens, → mind.

Hâmat, from hâ-, intensive prefix, variant of ham-, → com-, + mat- "think; thought," from Av. mat- matay- "to think," humat- "good thought;" cf. Skt. matāy-.

1) A series of comments, explanations, or annotations (Dictionary.com).
2) An explanatory essay or treatise (Dictionary.com).

From M.E. commentaries (plural), from L. commentarium "notebook," noun use of neuter of commentarius, from comment(um), → comment, + -arium, → -ary.

Hâmatgân, from hâmat, → comment, + gân suffix forming plural entities, from Mid.Pers. -gânag, -gâna.

To deliver, to write a → commentary on.

Verb from → comment.

1) A person who makes commentaries.
2) A person who discusses news, sports events, weather, or the like, as on television or radio.

Agent noun from → commentate.